What I want to know is, why is Boris Johnson so important? He's a backbench MP with a part-time job as mayor of one city: OK, it's the capital city, but being mayor makes so few demands that Boris can combine it forst with a career in journalism, subsequently with being an MP - and the part of the city that actually makes the money (i.e. the City) has its own mayor anyway.

I understand that in the internal machinations of the Tory party he is seen as a challenger for the leadership (which I find about as credible as Donald Trump having any sort of leadership potential - but there you go); but why should the rest of us be interested?

Yet he's all over the front pages of the national - I repeat, national - press for the second day running.